ABB C1900 Series Installation guide

Brand: ABB

Model: C1900 Series

Type: Installation guide

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ABB MEASUREMENT & ANALYTICS | OPERATING INSTRUCTIONS | IM/C1900-MOD REV. G

C1900

Circular chart recorder and recorder/controller

MODBUS (RTU)

communications option

Measurement made easy

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C1900

Circular chart recorder and recorder/

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C1900

circular chart recorder

and recorder/controller

Electrical safety

This equipment complies with the requirements of CEI/IEC

61010-1:2001-2 ‘Safety Requirements for Electrical Equipment

for Measurement, Control and Laboratory Use’. If the

equipment is used in a manner NOT specified by the Company,

the protection provided by the equipment may be impaired.

Symbols

One or more of the following symbols may appear on the

equipment labelling:

Warning – refer to the manual for instructions

Caution – risk of electric shock

Protective earth (ground) terminal

Earth (ground) terminal

Direct current supply only

Alternating current supply only

Both direct and alternating current supply

The equipment is protected through double insulation

Information in this manual is intended only to assist our

customers in the efficient operation of our equipment. Use of

this manual for any other purpose is specifically prohibited and

its contents are not to be reproduced in full or part without

prior approval of the Technical Publications Department.

Health and safety

To ensure that our products are safe and without risk to health,

the following points must be noted:

• The relevant sections of these instructions must be read

carefully before proceeding.

• Warning labels on containers and packages must be

observed.

• Installation, operation, maintenance and servicing must

only be carried out by suitably trained personnel and in

accordance with the information given.

• Normal safety precautions must be taken to avoid the

possibility of an accident occurring when operating in

conditions of high pressure and/or temperature.

• Chemicals must be stored away from heat, protected from

temperature extremes and powders kept dry. Normal safe

handling procedures must be used.

• When disposing of chemicals ensure that no two chemicals

are mixed.

Safety advice concerning the use of the equipment described in

this manual or any relevant hazard data sheets (where

applicable) may be obtained from the Company address on the

back cover, together with servicing and spares information.

CONTENTS 1 INTRODUCTION

Information.

• The COMMANDER 1900 Series is extended by the

addition of a serial data communication option

designed for use with SCADA systems.

• RS422/485 Communication standard.

• Modbus RTU protocol – for master (host computer)

to slave (COMMANDER 1900) system.

• Isolated (500V) from rest of instrument.

• 3 and 5 Wire communication supported.

• Baud rate – from 1200 to 9600.

• Parity-checking – of message available.

Section Page

1 INTRODUCTION ......................................................... 1

2 ELECTRICAL INSTALLATION .................................. 2

2.1 Selection of Serial Communication

Adaptors for Personal Computers ................... 2

2.2 Recommended OPTO22 Boards ..................... 2

2.3 Pull-up and Pull-down Resistors ...................... 2

2.4 Termination Resistors....................................... 4

2.5 RS485/422 Standard ........................................ 4

2.6 Serial Connections ........................................... 5

3 ADVANCED CONFIGURATION LEVEL .................... 6

3.1 Serial Data Communication Page .................... 7

4 MODBUS PROTOCOL ............................................... 8

4.1 Introduction to Modbus Protocol ...................... 8

4.1.1 Non-volatile Memory

Limitations ........................................... 8

4.2 Modbus Function Codes .................................. 8

5 MODBUS FUNCTIONS ............................................... 9

5.1 Read Coil Status – Function Code 01 ............. 9

5.1.1 Read Coil Status Query ...................... 9

5.1.2 Read Coil Status Response ............... 9

5.2 Read Holding Register – Function Code 03 .... 9

5.2.1 Read Holding Register Query ............ 9

5.2.2 Read Holding Register Response .... 10

5.3 Force Single Coil – Function Code 05 ........... 10

5.3.1 Force Single Coil Query ................... 10

5.3.2 Force Single Coil Response ............. 10

5.4 Preset Single Register – Function Code 06 .. 11

5.4.1 Preset Single Register Query ........... 11

5.4.2 Preset Single Register Response .... 11

5.5 Loopback Test – Function Code 08 ............... 11

5.5.1 Loopback Test Query ........................ 11

5.5.2 Loopback Test Response ................. 11

5.6 Write Multiple Registers – Function Code 16 12

5.6.1 Write Multiple Registers Query......... 12

5.6.2 Write Multiple Registers Response .. 12

6 EXCEPTION RESPONSES ...................................... 13

6.1 Examples ....................................................... 13

7 MODBUS REGISTERS ............................................. 14

7.1 Coils .......................................................... 14

7.2 Holding Registers ........................................... 16

7.3 Controller Settings/Outputs ............................ 17

7.4 Set Points ....................................................... 18

7.5 Alarm Settings ................................................ 18

7.6 Chart Settings................................................. 19

7.7 Ramp/Soak Settings ...................................... 19

7.8 Totalizer Settings ............................................ 20

7.9 Holding Registers –

Pasteurizer Versions Only .............................. 21

2.1 Selection of Serial Communication Adaptors for Personal Computers

Information.

• A RS422/485 communication board is required in the host PC.

• Observe the limitations outlined in the Installation Guide – the maximum serial data transmission line length for both

RS422 and RS485 systems is 1200m.

An RS422/485 communications adaptor is required for serial links. It is strongly recommended that the card used has galvanic

isolation to protect the computer from lightning damage and increase immunity from noise pick-up.

2.2 Recommended OPTO22 Boards

The following OPTO22 boards are recommended for use with the COMMANDER 1900 Series of instruments:

Part No. Computer Type

AC24 AT AT Bus IBM PC compatible

AC34 Microchannel IBM PC

2.3 Pull-up and Pull-down Resistors – Figs. 2.1 and 2.2

To prevent false triggering of the slave (COMMANDER 1900) by the presence of noise when the master (host computer) is

inactive, 1.8K pull-up and pull-down resistors must be fitted to the RS422/485 adaptor card – see Figs. 2.1 and 2.2.

2 ELECTRICAL INSTALLATION

Fig. 2.1 Pull-up and Pull-down Resistors (3-wire Operation)

Tx+

Tx–

GND

+5V

Computer Terminal or Host Computer

Rx–

Rx+

Tx–

Tx+

'A'

'B'

Serial Module

Terminal Board

COMMANDER 1900

Pull-up and Pull-down Resistors

+5V

1.8kΩ Pull-up Resistor

1.8kΩ Pull-down Resistor

'A'

'B'

310

Linked In

Linked Out

+5V

1.8kΩ Pull-up

Resistor

1.8kΩ Pull-down

Resistor

'A'

'B'

'A'

'B'

Links on Serial Module

Tx+/Rx+

Tx–/Rx–

PL2

GND

Note. If an RS422/485 adaptor card without pull-up and pull-down

resistors is used, the COMMANDER 1900's internal resistors can be

linked in.

2 ELECTRICAL INSTALLATION…

Rx+

Rx–

Tx+

Tx–

Computer Terminal or Host Computer

Serial Module

Terminal Board

'A'

'B'

'A'

GND

Links on Serial Module

PL2

COMMANDER 1900

Linked Out

+5V

1.8k

Pull-down

Resistor

1.8K Pull-up

Resistor

+5V

1.8k

Pull-up

Resistor

1.8kΩ Pull-down

Resistor

Note. If an RS422/485 adaptor card without pull-up and pull-down resistors is used, the COMMANDER 1900's

internal resistors must be linked out.

Fig. 2.2 Pull-up and Pull-down Resistors (5-wire Operation)

…2 ELECTRICAL INSTALLATION

2.4 Termination Resistors – Fig. 2.3

For long transmission lines, termination resistors are required on the last slave in the chain and the host computer/computer

terminal – see Fig. 2.3. Under normal operating conditions the resistors are required at the receive inputs only. For 3-wire

operation the slave termination resistor is fitted to the serial module terminal board – see Fig. 2.3A. For 5-wire operation the slave

termination resistor is selected using plug-in links on the serial module – see Fig. 2.3B.

2.5 RS485/422 Standard

The RS485 standard quotes connection of thirty two slaves maximum, to any single driver (computer terminal or host computer);

the RS422 standard quotes connection of up to ten slaves. However, these numbers can be increased if the driver’s serial port

permits.

12 1

A – 3-wire Operation

120Ω

External Termination Resistor – see Note

Tx+/Rx+

Tx–/Rx–

B – 5-wire Operation

Termination

Resistor

Linked In –

see Note

112

310

211

Termination

Resistor

Linked Out

310

211

112

PL2

Fig. 2.3 Slave Termination Resistors

Note.

• For

3-wire operation an external 120Ω resistor must be on the last slave in the chain. The resistor is fitted across

terminals 4 and 5 on the serial module terminal board.

• For

5-wire operation the internal termination resistor on the last slave in the chain must be linked in.

2 ELECTRICAL INSTALLATION

2.6 Serial Connections – Fig. 2.4

Information.

• Up to

10 slaves can be connected to a single RS422 adaptor card on a PC.

• Up to 32 slaves can be connected to a single RS485 adaptor card on a PC.

• The maximum serial data transmission line length for both

RS422 and RS485 systems is 1200m.

All connections, apart from those for serial data communication, are made as shown in

Section 4 of the Installation Guide

Make serial data connections as shown in Fig. 2.4. The type of cable used is dependent on the cable length:

Up to 6m – standard screened or twisted pair cable

Up to 300m – twin twisted pair with overall foil screen and an integral drain wire, e.g. Belden 9502 or equivalent

Up to 1200m – twin twisted pair with separate foil screens and integral drain wires for each pair, e.g. Belden 9729

or equivalent

Fig. 2.4 Serial Module Connections

A – Connections for 3-wire Operation

B – Connections for 5-wire Operation

Connections

GND

TX+

TX–

RX+

RX–

OPTO22 Board Pin Identification

Part Number AC24 AT & AC34

TX+

TX–

GND

COMMANDER 1900 Serial Module Terminal Board

Terminal Number Connections

Table 2.2 Terminal and Pin Identification for 5-wire Operation

Table 2.1 Terminal and Pin Identification for 3-wire Operation

COMMANDER 1900 Serial Module Terminal Board

Connections

GND

TX+

TX–

RX+

RX–

OPTO22 Board Pin Identification

Part Number AC24 AT & AC34

GND

TX+

TX–

RX+

RX–

ConnectionsTerminal Number

OPTO22 Adaptor

Board Connections

Serial Module

Connections

Tx+

Tx–

Rx+

Rx–

GND

Tx+

Tx–

Rx+

Rx–

GND

Serial Module

Connections

OPTO22 Adaptor

Board Connections

Tx+

Tx–

GND

Tx+

Tx–

Rx+

Rx–

GND

Screen

3 ADVANCED CONFIGURATION LEVEL

Set Up Functions Keys

Set Up Logic

Set up Function Keys

SEtUP

F–KEY1

Set Up Logic

SEtUP

LOGIC

Set Up RS485

Section 3.1, opposite

SEtUP

rS 485

3/5 Wire Select

Controller Ident

Parity

tYPE

_LINE

Baud Rate

Set Up RS485

bAUd

____

IdENt

____

PArItY

____

OPrtOr

LEVEL

bASIC

CONFIG

AdVNCd

CONFIG

Basic Config

Advanced Config

Operator Level

CONtrL

CONFIG

Control Config

Set Up Logic

PEN

FUNCt

Set Up Pen Function

Input Assignment

INPUt

ASSIGN

Input Assignment

Refer to Programming Guide

Fig. 3.1 Location of the Serial Data (RS485) Communication Page

3 ADVANCED CONFIGURATION LEVEL

3.1 Serial Data Communication Page

Information.

• Programmable for 3 or 5 wire connections.

• Programmable baud rate (1200 to 9600 baud).

• Odd or even parity.

The general programming procedure is as detailed in the

Operating Guide. In this Section, parameters in the lower display denoted

 are Company Standard Settings. The instrument is dispatched programmed with these settings.

tYPE

3 LINE

bAUd

1200

SEt UP

rS 485

5 LINE

2400

4800

9600

IdENt

PArItY

NONE

Odd

EVEN

Page Header – Set Up RS485.

Connection Type

Select the required number of transmission wires (3 line, 5 line).

Transmission Rate

Select the transmission rate required (1200 slowest, 9600 fastest).

Controller Identification

Assign the controller an identification number between 1 and 99.

Parity

Select the appropriate parity to match the computer terminal or host computer.

Return to Set Up RS485 frame.

4 MODBUS PROTOCOL

Table 4.1 Modbus Function Codes

*NAK = Negative Acknowledgement

Information.

• The COMMANDER 1900 operates as a Modbus, Remote Terminal Unit (RTU) slave.

• Parity checking – used to detect transmission errors in individual characters.

• Cyclic redundancy checking – used to detect errors in the master messages and slave responses.

• Non-volatile memory save command.

4.1 Introduction to Modbus Protocol

Modbus communication is based on a master and a slave arrangement. The master sends a message to one slave at a time and

waits for a reply.

The slave cannot accept a new message until the existing message is processed and a reply sent to the master (maximum

response time 250 milliseconds). The slave monitors the elapsed time between receipt of characters. If the elapsed time without

a new character is 3

2 character times, the slave assumes the next character received is the start of a new message.

To allow the master to differentiate between more than one slave in a system, each slave is given a unique identity address

(between 1 and 99).

A broadcast address (address zero) can be used to access all slave devices with one command. This is limited to write messages

only and there is no slave acknowledgment.

Note. Modbus RTU requires 1 start bit, 8 data bits, 1 parity bit (optional) and 1 or 2 stop bits.

4.1.1 Non-volatile Memory Limitations

Note. A non-volatile memory is used to store any parameter changes made via the serial link to ensure that the information

is retained during mains interruption or power-down. The memory used is rated at 10

write cycles per register and each

register is assigned a particular parameter, e.g. Alarm trip value, Channel 1. If the number of write cycles to any particular

To restrict unnecessary use of the non-volatile memory registers the memory enable/disable command is provided (Coil number

181, Section 7.1). The command can be used before parameters which do not need to be stored in the non-volatile memory, e.g.

frequently changed parameters or parameters which do not have to be retained on power-down.

4.2 Modbus Function Codes

The function code field instructs the addressed slaves what function to perform. Table 4.1 shows the function codes, their

meaning, and the action they initiate.

Modbus

Function Code

Modbus Message Name COMMANDER 1900 Definition

01 Read Coil Status

Read up to 16 consecutive discrete (boolean) points from a specific starting point. The

COMMANDER 1900 returns zeros for points which do not contain defined data and NAKs*

any request for point numbers greater than 200.

03 Read Holding Register

Read up to 8 consecutive registers from a specific starting register. The COMMANDER

1900 returns zeros from registers which do not contain defined data and NAKs any request

for register numbers greater than 250.

05 Force Single Coil

Write one discrete (boolean) point. The COMMANDER 1900 NAKs this if the point is not

currently writeable.

06 Preset Single Register

Write one register. The COMMANDER 1900 NAKs if the register is not currently writeable.

This function code also applies to any currently applicable limits to the value before storage

in the database.

08 Loopback Diagnostic Test Echo the message, only ‘Return of Query’ is supported.

16 Preset Multiple Registers

Write up to 8 consecutive registers from a specified starting register. The COMMANDER

1900 NAKs if any of the registers are not currently writeable, but still carries out all the

writes which are valid, applying any currently applicable limits to the value before storage in

the database. This function code is only available if ‘write to non-volatile memory’ is

disabled – see coil number 181.

5 MODBUS FUNCTIONS

This section shows typical examples of Modbus function codes 01, 03, 05, 06, 08 and 16.

5.1 Read Coil Status – Function Code 01

5.1.1 Read Coil Status Query

This function allows the user to obtain the ON/OFF status of logic coils used to control discrete outputs from the addressed slave

only. Broadcast mode is not supported with this function code. In addition to the slave address and function fields, the message

requires that the information field contain the initial coil offset address to be read (starting address) and the number of locations

to be interrogated must obtain status data.

Note. The coil offset address is the coil number minus one, e.g. to start at coil 31 the data start value must be set to 30 (1EH).

Example – a read coil status request to read 16 coils from slave (01) starting at coil 31 (alarm A status channel 1) is shown below.

5.1.2 Read Coil Status Response

The data is packed one bit for each coil (1 = ON, 0 = OFF). The response includes the slave address, function code, quantity of

data characters, the data characters and error checking. The low order bit of the first character contains the first addressed coil

and the remainder follow. For coil quantities that are not even multiples of eight, the last characters are filled in with zeros at high

order end.

Example – the response to the read coil status query shows the following:

Alarm A status channel 1 ON

Alarm B status channel 1 OFF

Alarm C status channel 1 ON

Alarm D status channel 1 OFF

Alarm A,B,C,D status channel 2 all OFF

Alarm A,B,C,D status channel 3 all OFF

Alarm A,B,C,D status channel 4 all OFF

Address Function

Coil Start

Offset High

Coil Start

Offset Low

Number of

Coils High

Number of

Coils Low

Error Check Field (CRC-16)

01 01 00 1E 00 10 5D C0

5.2 Read Holding Register – Function Code 03

5.2.1 Read Holding Register Query

The Read holding registers allow the user to obtain the binary contents of holding registers in the addressed slave.

Note. The data start register must contain the offset address of the first register to be accessed, e.g. to start at register 121the

data start register must contain 120 (78H).

Broadcast mode is not allowed.

Example – a read holding register request to read 6 holding registers from slave (01) starting at holding address 121 (alarm trip

A1) is shown below.

Address Function Byte Count

Data Coil Status

31 to 38

Data Coil Status

39 to 46

Error Check Field (CRC-16)

01 01 02 05 00 BA AC

Address Function

Offset High

Offset Low

Data Number of

Registers High

Data Number of

Registers Low

Error Check Field (CRC-16)

01 03 00 78 00 06 45 D1

…5 MODBUS FUNCTIONS

5.2.2 Read Holding Register Response

The addressed slave responds with its address and function code, followed by the information field. The information field contains

1 byte describing the quantity of data bytes to be returned. The contents of each register requested (DATA) is two bytes, the first

byte includes the high order bits and the second the low order bits.

Example – the response to the read holding register query shows the following:

Alarm trip A1 – 150

Alarm trip B1 – 50

Alarm trip C1 – 100

Alarm trip D1 – 400

Alarm trip A2 – 0

Alarm trip B2 – 0

5.3 Force Single Coil – Function Code 05

5.3.1 Force Single Coil Query

This message forces a single coil either ON or OFF. The data value 65,280 (FF00 HEX) sets the coil ON and the value zero turns

it OFF. All other values are illegal and do not affect the coil.

Note. To write to a coil the coil offset address must be used, e.g. to write to coil 149, the coil address 148(94H) is transmitted.

The use of slave address zero (broadcast mode) forces all attached slaves to modify the desired coil.

Example – a force single coil request to switch ON coil address 149 (auto/manual state, channel 1) in slave 01 is shown below.

5.3.2 Force Single Coil Response

The response is confirmation of the query after the coil state has been altered.

Example:

Address Function

Byte

Count

Holding

High Low

Holding

High Low

Holding

High Low

Holding

High Low

Holding

High Low

Holding

High Low

Error Check Field

(CRC-16)

01 03 0C 00 96 00 32 00 64 01 90 00 00 00 00 D9 91

Address Function

Coil Offset

High

Coil Offset

Low

Data Value High Data Value Low Error Check Field (CRC-16)

01 05 00 94 FF 00 CD D6

Address Function

Coil Offset

High

Coil Offset

Low

Data Value High Data Value Low Error Check Field (CRC-16)

01 05 00 94 FF 00 CD D6

5.4 Preset Single Register – Function Code 06

5.4.1 Preset Single Register Query

The preset single register allows the user to modify the contents of a holding register.

Note. Function codes 5, 6 and 16 are the only messages that are recognized as valid for broadcast.

Example – a preset single register request to write the value 500 to holding register address 121 (alarm trip A1) in slave 01 is

shown below.

Note. To write to a register, the register’s offset address must be used, e.g. to write to register 121, the offset address

120(78H) is transmitted.

5 MODBUS FUNCTIONS…

5.4.2 Preset Single Register Response

The normal response to a preset single register request is to retransmit the query message after the register has been altered.

Example:

5.5 Loopback Test – Function Code 08

5.5.1 Loopback Test Query

The purpose of the loopback test is to test the Modbus system, it does not affect the content of the controller. Variations in the

response may indicate faults in the Modbus system. The information field contains 2 bytes for the designation of the diagnostic

code followed by 2 bytes to designate the action to be taken.

Example:

*These are considered to be the information fields for diagnostic mode.

5.5.2 Loopback Test Response

The response always echoes the query, only diagnostic code 0 (bytes 3 and 4) can be used.

Example:

Address Function

Offset High

Offset Low

Data Value High Data Value Low Error Check Field (CRC-16)

01 06 00 78 01 F4 09 C4

Address Function

Offset High

Offset Low

Data Value High Data Value Low Error Check Field (CRC-16)

01 06 00 78 01 F4 09 C4

Address Function

Data Diagnostic

Code High

Data Diagnostic

Code Low

Data* Data * Error Check Field (CRC-16)

01 08 00 00 A5 37 DA 8D

Address Function

Data Diagnostic

Code High

Data Diagnostic

Code Low

Data Data Error Check Field (CRC-16)

01 08 00 00 A5 37 DA 8D

…5 MODBUS FUNCTIONS

5.6 Write Multiple Registers – Function Code 16

5.6.1 Write Multiple Registers Query

Holding registers existing within the controller can have their contents changed by this message (a maximum of 8 registers).

When used with slave address zero (broadcast mode) all slave controllers load the selected registers with the contents specified.

Example – a write multiple register request to write the value 10 to the register address 121 and the value 100 to the register

address 122 in slave 01 is shown below.

5.6.2 Write Multiple Registers Response

The response confirms slave identification, function code, starting register address and quantity only.

Example:

Address Function

Start

Offset

High

Start

Offset

Low

Number

Registers

Byte

Count

Holding

121 High

Holding

121 Low

Holding

122 High

Holding

122 Low

Error Check Field

(CRC-16)

01 10 00 78 00 02 04 00 0A 00 64 D4 C4

Address Function

Offset High

Offset Low

Number of Registers Error Check Field (CRC-16)

01 10 00 78 00 02 00 10 90

6 EXCEPTION RESPONSES

The exception response codes sent by the slave are shown in Table 6.1. When a slave detects one of these errors, it sends a

response message to the master consisting of slave address, function code, error code and error check fields.

Exception

Response

Code

Exception Response Name Exception Response Definition

01 Illegal Function The message function received is not an allowable action for the C1900.

02 Illegal Data Address The address reference in the data field is not an allowable address for the C1900.

03 Illegal Data Value The value referenced in the data field is not allowable in the addressed slave location.

07 Negative Acknowledgment The function just requested cannot be performed.

08 Memory Parity Error Parity check indicates an error in one or more of the characters received.

Table 6.1 Exception Response Codes

6.1 Examples

A read register request to read holding register address 251 of slave 01 (undefined address for slave, beyond address limit) is

shown below.

The response is an exception response sighting ‘illegal data address’. To indicate that the response is a notification of an error, the

most significant bit of the function code is set to 1.

Slave

Address

Function

Offset High

Offset Low

Number of

Registers High

Number of

Registers Low

Error Check Field (CRC-16)

01 03 00 FA 00 06 E5 F9

Slave Address Function Exception Code Error Check Field (CRC-16)

01 83 02 CO F1

7 MODBUS REGISTERS

7.1 Coils

Coil Number Read/Write Description Response/Entry

Input Failure States

011 R Main Input

012 R Module 2

013 R Module 3 0 = Active

014 R Module 4 1 = Failed

015 R Module 5

A to D Converter

Failure States

021 R Main Converter

022 R Module 2

023 R Module 3 0 = Active

024 R Module 4 1 = Failed

025 R Module 5

Alarm Status

031 R Alarm A Channel 1

032 R Alarm B Channel 1

033 R Alarm C Channel 1

034 R Alarm D Channel 1

035 R Alarm A Channel 2

036 R Alarm B Channel 2

037 R Alarm C Channel 2

038 R Alarm D Channel 2 0 = Inactive

039 R Alarm A Channel 3 1 = Active

040 R Alarm B Channel 3

041 R Alarm C Channel 3

042 R Alarm D Channel 3

043 R Alarm A Channel 4

044 R Alarm B Channel 4

045 R Alarm C Channel 4

046 R Alarm D Channel 4

Digital Input States

051 R Main Module Digital Input 1

052 R Main Module Digital Input 2

061 R Module 2 Digital Input 1

062 R Module 2 Digital Input 2

071 R Module 3 Digital Input 1

072 R Module 3 Digital Input 2

081 R Module 4 Digital Input 1

082 R Module 4 Digital Input 2

083 R Module 4 Digital Input 3

084 R Module 4 Digital Input 4

085 R Module 4 Digital Input 5 0 = Inactive

086 R Module 4 Digital Input 6 1 = Active

087 R Module 4 Digital Input 7

088 R Module 4 Digital Input 8

091 R Module 5 Digital Input 1

092 R Module 5 Digital Input 2

093 R Module 5 Digital Input 3

094 R Module 5 Digital Input 4

095 R Module 5 Digital Input 5

096 R Module 5 Digital Input 6

097 R Module 5 Digital Input 7

098 R Module 5 Digital Input 8

7 MODBUS REGISTERS…

…7.1 Coils

Coil Number Read/Write Description Response/Entry

Logic Equation Results

121 R Logic Equation 1

122 R Logic Equation 2

123 R Logic Equation 3

124 R Logic Equation 4 0 = Inactive

125 R Logic Equation 5 1 = Active

126 R Logic Equation 6

127 R Logic Equation 7

128 R Logic Equation 8

Real Time States

131 R Channel 1 0 = Inactive

132 R Channel 2 1 = Active

Auto/Manual States

141 R Manual State Channel 1 0 = Auto, 1 = Manual

142 R Auto State Channel 1 0 = Manual, 1 = Auto

143 R Manual State Channel 2 0 = Auto, 1 = Manual

144 R Auto State Channel 2 0 = Manual, 1 = Auto

149 R/W A/M State Channel 1 0 = Auto, 1 = Manual

150 R/W A/M State Channel 2 0 = Auto, 1 = Manual

On/Off Count States

151 R Channel 1 0 = Off

152 R Channel 2 1 = On

Valve Open/Close Relay States

161 R Open Relay State Ch. 1

162 R Close Relay State Ch. 1 0 = De-energized

163 R Open Relay State Ch. 2 1 = Energized

164 R Close Relay State Ch. 2

171* R Event Status 0 = Divert, 1 = Forward

(C1951, C1952, C1953

Pasteurizer versions only)

MODBUS

181 R/W Save MODBUS writes to

Non-Volatile Memory 0 = Not Saved, 1 = Saved

…7 MODBUS REGISTERS

7.2 Holding Registers

Analog Inputs

011 R Process Variable 1 In Engineering Units in

012 R Process Variable 2 Range –9999 to +9999

013 R Process Variable 3

014 R Process Variable 4

015 R Process Variable 1 Failure State 0 = Input Active

016 R Process Variable 2 Failure State 1 = Input Failed

017 R Process Variable 3 Failure State 2 = A to D Failed

018 R Process Variable 4 Failure State 3 = Input and A to D Failed

Number of Decimal Points

019 R Process Variable 1 Value

020 R Process Variable 2 Value 0 to 3 Decimal Places

021 R Process Variable 3 Value

022 R Process Variable 4 Value

Input Values

031 R Main Input

032 R Module 2

033 R Module 3 In Engineering Units in

034 R Module 4 Range –9999 to +9999

035 R Module 5

Engineering Ranges

041 R Input 1 Decimal Point Position

042 R Input 2 Decimal Point Position

043 R Input 3 Decimal Point Position 0 to 3 Decimal Places

044 R Input 4 Decimal Point Position

045 R Input 5 Decimal Point Position

7 MODBUS REGISTERS…

7.3 Controller Settings/Outputs

Controller Settings/Outputs

Channel 1

051 R Process Variable 1 –9999 to +9999

052 R/W Control Set Point –9999 to +9999

053 R/W Control Output (write in manual mode) 0 to 1000 Representing (0.0.to 100.0%)

054 R Position Feedback 1 0 to 1000 Representing (0.0.to 100.0%)

0 = Input Active

055 R Position Feedback 1 Failure State 1 = Input Failed

2 = A to D Failed

3 = Input and A to D Failed

056 R/W On/Off Hysteresis Value 0 to 1000 Representing (0.0.to 100.0%)

057 R/W Cycle-Time Heat Control 10 to 3000 (1.0 to 300.0 Seconds)

058 R/W Proportional Band (Heat) Control 1 to 9999 (0.1 to 999.9%)

059 R/W Integral Value (Heat) Control 0 = OFF, 1 to 7200 Seconds

060 R/W Manual Reset (Heat) Control 0 to 1000 (0.0 to 100.0%)

061 R/W Derivative Action 1 to 9999 (0.1 to 999.9 Seconds)

062 R/W Approach Band 1 to 30 (0.1 to 3.0)

063 R/W Heat Output (write manual mode only) 0 to 1000 (0.0 to 100.0%)

064 R/W Cool Output (write manual mode only) 0 to 1000 (0.0 to 100.0%)

065 R/W Proportional Band Cool Control 1 to 9999 (0.1 to 999.9%)

066 R/W Integral Value Cool Control 0 = OFF, 1 to 7200 Seconds

067 R/W Manual Reset Cool Control 0 to 1000 (0.0 to 100.0%)

068 R/W Cycle-Time Cool Control 10 to 3000 (1.0 to 300.0 Seconds)

069 R/W Crossover Band 0 to 1000 (0.0 to 100.0%)

070 R/W Transition Band 0 to 1000 (0.0 to 100.0%)

Controller Settings/Outputs

Channel 2

071 R Process Variable 2 –9999 to +9999

072 R/W Control Set Point –9999 to +9999

073 R/W Control Output (write in manual mode) 0 to 1000 Representing (0.0.to 100.0%)

074 R Position Feedback 2 0 to 1000 Representing (0.0.to 100.0%)

0 = Input Active

075 R Position Feedback 2 Failure State 1 = Input Failed

2 = A to D Failed

3 = Input and A to D Failed

076 R/W On/Off Hysteresis Value 0 to 1000 Representing (0.0.to 100.0%)

077 R/W Cycle-Time Heat Control 10 to 3000 (1.0 to 300.0 Seconds)

078 R/W Proportional Band (Heat) Control 1 to 9999 (0.1 to 999.9%)

079 R/W Integral Value (Heat) Control 0 = OFF, 1 to 7200 Seconds

080 R/W Manual Reset (Heat) Control 0 to 1000 (0.0 to 100.0%)

081 R/W Derivative Action 1 to 9999 (0.1 to 999.9 Seconds)

082 R/W Approach Band 1 to 30 (0.1 to 3.0)

083 RW Heat Output (write manual mode only) 0 to 1000 (0.0 to 100.0%)

084 RW Cool Output (write manual mode only) 0 to 1000 (0.0 to 100.0%)

085 R/W Proportional Band Cool Control 1 to 9999 (0.1 to 999.9%)

086 R/W Integral Value Cool Control 0 = OFF, 1 to 7200 Seconds

087 R/W Manual Reset Cool Control 0 to 1000 (0.0 to 100.0%)

088 R/W Cycle-Time Cool Control 10 to 3000 (1.0 to 300.0 Seconds)

089 R/W Crossover Band 0 to 1000 (0.0 to 100.0%)

090 R/W Transition Band 0 to 1000 (0.0 to 100.0%)

…7 MODBUS REGISTERS

7.4 Set Points

Set Points Channel 1

101 R/W Local Set Point –9999 to +9999

102 R/W Dual Set Point –9999 to +9999

103 R Remote Set Point (without Ratio/Bias) –9999 to +9999

104 R Remote Set Point (with Ratio/Bias) –9999 to +9999

105 R Remote Set Point Failure State Refer to Process Variable Failure States

107 R/W Set Point Selection 0 = Local, 1 = 2nd Set Point

Set Points Channel 2

111 R/W Local Set Point –9999 to +9999

112 R/W Dual Set Point –9999 to +9999

113 R Remote Set Point (without Ratio/Bias) –9999 to +9999

114 R Remote Set Point (with Ratio/Bias) –9999 to +9999

115 R Cascade Set Point –9999 to +9999

116 R Remote Set Point Failure State Refer to Process Variable Failure States

117 R/W Set Point Selection 0 = Local, 1 = 2nd Set Point

7.5 Alarm Settings

Alarm Settings

121 R/W Alarm A Trip Value Channel 1

122 R/W Alarm B Trip Value Channel 1

123 R/W Alarm C Trip Value Channel 1

124 R/W Alarm D Trip Value Channel 1

125 R/W Alarm A Trip Value Channel 2

126 R/W Alarm B Trip Value Channel 2

127 R/W Alarm C Trip Value Channel 2

128 R/W Alarm D Trip Value Channel 2 –9999 to +9999 High/Low Process Limit

129 R/W Alarm A Trip Value Channel 3 5 to 5000 (0.5 to 500.0%) Fast/Slow Rate

130 R/W Alarm B Trip Value Channel 3 Alarm Limit

131 R/W Alarm C Trip Value Channel 3

132 R/W Alarm D Trip Value Channel 3

133 R/W Alarm A Trip Value Channel 4

134 R/W Alarm B Trip Value Channel 4

135 R/W Alarm C Trip Value Channel 4

136 R/W Alarm D Trip Value Channel 4

141 R Alarm A Type Channel 1

142 R Alarm B Type Channel 1

143 R Alarm C Type Channel 1

144 R Alarm D Type Channel 1

145 R Alarm A Type Channel 2 0 = Alarm Off

146 R Alarm B Type Channel 2 1 = High Process

147 R Alarm C Type Channel 2 2 = Low Process

148 R Alarm D Type Channel 2 3 = High Output

149 R Alarm A Type Channel 3 4 = Low Output

150 R Alarm B Type Channel 3 5 = High Deviation

151 R Alarm C Type Channel 3 6 = Low Deviation

152 R Alarm D Type Channel 3 7 = Fast Rate

153 R Alarm A Type Channel 4 8 = Slow Rate

154 R Alarm B Type Channel 4

155 R Alarm C Type Channel 4

156 R Alarm D Type Channel 4

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ABB C1900 Series Installation guide

ABB C1900 Series Installation guide

ABB C1900 Series Installation guide

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